Why would a school band need four first violins and no songwriters?

With printed parts, thirty players in an orchestra can open their folders and agree how to begin. A student can spend a whole school year inside that organisation without once asking what a violin might do if there were no part for it.

Try an arrangement week. Give a group a sung melody and a bass line and ask them to fill thirty seconds. Let one violin double the tune, give another a short answer, and ask the loudest players whether the song needs them in every bar. Photograph the first arrangement. Record the second. Compare what happened when a person with no leadership title got to change a part.

A school ensemble earns its rehearsal time by doing more than performing efficient labour for a concert. Learning who plays what, negotiating an empty measure, and realising that the room can hear the horns over everything else are parts of being a musician. Give students a narrow place to make those decisions without asking the conductor to cede the entire programme.

If the annual concert is too near to make room for an experiment, put five minutes in the first rehearsal after it. The student who gets to write four bars may understand the next printed part with much more curiosity.